Carla -- In all my readings, the male figure wearing a beret-like cap,
second from the right, part the right foreground group yet barely visible,
has been identified as Raphael. He is standing next to the figure of
Sodoma, to the left of the figure of Ptolemy, holding a celestial globe.
The figure in white, part of the left foreground group is unidentified,
however, it is fairly certain that he is based on a contemporary of
Raphael, as are most of the figures in this painting. It would have been
improper for the artist to have painted himself in such a prominent
manner, despite artists' awareness of their worth and importance during
this age.

P.S. You probably already know that the figure brooding over his box-desk
has the feature of Michelangelo. And Euclid (the man bent over a slate in
the right foreground group) has the features of Bramante.